private bool buildBackups()
{
try
{
backupMutex.WaitOne();
if (!disposed && Backup && backups.Count < BackupPoolSize)
{
List <Uri> connectList = ConnectList;
foreach (BackupTransport bt in backups)
{
if (bt.Disposed)
{
backups.Remove(bt);
}
}
foreach (Uri uri in connectList)
{
if (ConnectedTransportURI != null && !ConnectedTransportURI.Equals(uri))
{
try
{
BackupTransport bt = new BackupTransport(this);
bt.Uri = uri;
if (!backups.Contains(bt))
{
ITransport t = TransportFactory.CompositeConnect(uri);
t.Command = new CommandHandler(bt.onCommand);
t.Exception = new ExceptionHandler(bt.onException);
t.Start();
bt.Transport = t;
backups.Add(bt);
}
}
catch (Exception e)
{
Tracer.DebugFormat("Failed to build backup: {0}", e.Message);
}
}
if (backups.Count < BackupPoolSize)
{
break;
}
}
}
}
finally
{
backupMutex.ReleaseMutex();
}
return(false);
}
private bool BuildBackups()
{
lock (backupMutex)
{
if (!disposed && Backup && backups.Count < BackupPoolSize)
{
List <Uri> connectList = ConnectList;
foreach (BackupTransport bt in backups)
{
if (bt.Disposed)
{
backups.Remove(bt);
}
}
foreach (Uri uri in connectList)
{
if (ConnectedTransportURI != null && !ConnectedTransportURI.Equals(uri))
{
try
{
BackupTransport bt = new BackupTransport(this)
{
Uri = uri
};
if (!backups.Contains(bt))
{
ITransport t = TransportFactory.CompositeConnect(uri);
t.Command = bt.OnCommand;
t.Exception = bt.OnException;
t.Start();
bt.Transport = t;
backups.Add(bt);
}
}
catch (Exception e)
{
Tracer.DebugFormat("Failed to build backup: {0}", e.Message);
}
}
if (backups.Count == BackupPoolSize)
{
break;
}
}
}
}
return(false);
}
private bool DoConnect()
{
lock (reconnectMutex)
{
if (ConnectedTransport != null || disposed || connectionFailure != null)
{
return(false);
}
else
{
List <Uri> connectList = ConnectList;
if (connectList.Count == 0)
{
Failure = new NMSConnectionException("No URIs available for connection.");
}
else
{
if (!UseExponentialBackOff)
{
ReconnectDelay = InitialReconnectDelay;
}
ITransport transport = null;
Uri chosenUri = null;
try
{
foreach (Uri uri in connectList)
{
if (ConnectedTransport != null || disposed)
{
break;
}
Tracer.DebugFormat("Attempting connect to: {0}", uri);
// synchronous connect
try
{
Tracer.DebugFormat("Attempting connect to: {0}", uri.ToString());
transport = TransportFactory.CompositeConnect(uri);
chosenUri = transport.RemoteAddress;
break;
}
catch (Exception e)
{
Failure = e;
Tracer.DebugFormat("Connect fail to: {0}, reason: {1}", uri, e.Message);
}
}
if (transport != null)
{
transport.Command = new CommandHandler(OnCommand);
transport.Exception = new ExceptionHandler(OnException);
transport.Start();
if (started)
{
RestoreTransport(transport);
}
if (this.Resumed != null)
{
this.Resumed(transport);
}
Tracer.Debug("Connection established");
ReconnectDelay = InitialReconnectDelay;
ConnectedTransportURI = chosenUri;
ConnectedTransport = transport;
connectFailures = 0;
connected = true;
if (firstConnection)
{
firstConnection = false;
Tracer.InfoFormat("Successfully connected to: {0}", chosenUri.ToString());
}
else
{
Tracer.InfoFormat("Successfully reconnected to: {0}", chosenUri.ToString());
}
return(false);
}
}
catch (Exception e)
{
Failure = e;
Tracer.DebugFormat("Connect attempt failed. Reason: {0}", e.Message);
}
}
int maxAttempts = 0;
if (firstConnection)
{
if (StartupMaxReconnectAttempts != 0)
{
maxAttempts = StartupMaxReconnectAttempts;
}
}
if (maxAttempts == 0)
{
maxAttempts = MaxReconnectAttempts;
}
if (maxAttempts > 0 && ++connectFailures >= maxAttempts)
{
Tracer.ErrorFormat("Failed to connect to transport after {0} attempt(s)", connectFailures);
connectionFailure = Failure;
this.Exception(this, connectionFailure);
return(false);
}
}
}
if (!disposed)
{
Tracer.DebugFormat("Waiting {0}ms before attempting connection.", ReconnectDelay);
lock (sleepMutex)
{
try
{
Thread.Sleep(ReconnectDelay);
}
catch (Exception)
{
}
}
if (UseExponentialBackOff)
{
// Exponential increment of reconnect delay.
ReconnectDelay *= ReconnectDelayExponent;
if (ReconnectDelay > MaxReconnectDelay)
{
ReconnectDelay = MaxReconnectDelay;
}
}
}
return(!disposed);
}
private bool doConnect()
{
Exception failure = null;
try
{
reconnectMutex.WaitOne();
if (ConnectedTransport != null || disposed || connectionFailure != null)
{
return(false);
}
else
{
List <Uri> connectList = ConnectList;
if (connectList.Count == 0)
{
failure = new NMSConnectionException("No URIs available for connection.");
}
else
{
if (!UseExponentialBackOff)
{
ReconnectDelay = InitialReconnectDelay;
}
try
{
backupMutex.WaitOne();
if (Backup && backups.Count != 0)
{
BackupTransport bt = backups[0];
backups.RemoveAt(0);
ITransport t = bt.Transport;
Uri uri = bt.Uri;
t.Command = new CommandHandler(onCommand);
t.Exception = new ExceptionHandler(onException);
try
{
if (started)
{
restoreTransport(t);
}
ReconnectDelay = InitialReconnectDelay;
failedConnectTransportURI = null;
ConnectedTransportURI = uri;
ConnectedTransport = t;
connectFailures = 0;
connected = true;
Tracer.InfoFormat("Successfully reconnected to backup {0}", uri.ToString());
return(false);
}
catch (Exception e)
{
e.GetType();
Tracer.Debug("Backup transport failed");
}
}
}
finally
{
backupMutex.ReleaseMutex();
}
foreach (Uri uri in connectList)
{
if (ConnectedTransport != null || disposed)
{
break;
}
try
{
Tracer.DebugFormat("Attempting connect to: {0}", uri.ToString());
ITransport t = TransportFactory.CompositeConnect(uri);
t.Command = new CommandHandler(onCommand);
t.Exception = new ExceptionHandler(onException);
t.Start();
if (started)
{
restoreTransport(t);
}
Tracer.Debug("Connection established");
ReconnectDelay = InitialReconnectDelay;
ConnectedTransportURI = uri;
ConnectedTransport = t;
connectFailures = 0;
connected = true;
if (firstConnection)
{
firstConnection = false;
Tracer.InfoFormat("Successfully connected to: {0}", uri.ToString());
}
else
{
Tracer.InfoFormat("Successfully reconnected to: {0}", uri.ToString());
}
return(false);
}
catch (Exception e)
{
failure = e;
Tracer.ErrorFormat("Connect fail to '{0}': {1}", uri.ToString(), e.Message);
}
}
}
}
if (MaxReconnectAttempts > 0 && ++connectFailures >= MaxReconnectAttempts)
{
Tracer.ErrorFormat("Failed to connect to transport after {0} attempt(s)", connectFailures);
connectionFailure = failure;
onException(this, connectionFailure);
return(false);
}
}
finally
{
reconnectMutex.ReleaseMutex();
}
if (!disposed)
{
Tracer.DebugFormat("Waiting {0}ms before attempting connection.", ReconnectDelay);
try
{
sleepMutex.WaitOne();
try
{
Thread.Sleep(ReconnectDelay);
}
catch (ThreadInterruptedException)
{
}
}
finally
{
sleepMutex.ReleaseMutex();
}
if (UseExponentialBackOff)
{
// Exponential increment of reconnect delay.
ReconnectDelay *= ReconnectDelayExponent;
if (ReconnectDelay > MaxReconnectDelay)
{
ReconnectDelay = MaxReconnectDelay;
}
}
}
return(!disposed);
}
private bool DoConnect()
{
lock (reconnectMutex)
{
if (ConnectedTransport != null || disposed || connectionFailure != null)
{
return(false);
}
else
{
List <Uri> connectList = ConnectList;
if (connectList.Count == 0)
{
Failure = new NMSConnectionException("No URIs available for connection.");
}
else
{
if (!UseExponentialBackOff)
{
ReconnectDelay = InitialReconnectDelay;
}
try
{
backupMutex.WaitOne();
if (Backup && backups.Count != 0)
{
BackupTransport bt = backups[0];
backups.RemoveAt(0);
ITransport t = bt.Transport;
Uri uri = bt.Uri;
t.Command = OnCommand;
t.Exception = OnException;
try
{
if (started)
{
RestoreTransport(t);
}
ReconnectDelay = InitialReconnectDelay;
failedConnectTransportURI = null;
ConnectedTransportURI = uri;
ConnectedTransport = t;
connectFailures = 0;
connected = true;
Monitor.PulseAll(reconnectMutex);
if (this.Resumed != null)
{
this.Resumed(t);
}
Tracer.InfoFormat("Successfully reconnected to backup {0}", uri.ToString());
return(false);
}
catch (Exception e)
{
Tracer.DebugFormat("Backup transport failed: {0}", e.Message);
}
}
}
finally
{
backupMutex.ReleaseMutex();
}
ManualResetEvent allDone = new ManualResetEvent(false);
ITransport transport = null;
Uri chosenUri = null;
object syncLock = new object();
try
{
foreach (Uri uri in connectList)
{
if (ConnectedTransport != null || disposed)
{
break;
}
if (asyncConnect)
{
Tracer.DebugFormat("Attempting async connect to: {0}", uri);
// set connector up
Connector connector = new Connector(
delegate(ITransport transportToUse, Uri uriToUse)
{
if (transport == null)
{
lock (syncLock)
{
if (transport == null)
{
//the transport has not yet been set asynchronously so set it
transport = transportToUse;
chosenUri = uriToUse;
}
//notify issuing thread to move on
allDone.Set();
}
}
}, uri, this);
// initiate a thread to try connecting to broker
Thread thread = new Thread(connector.DoConnect)
{
Name = uri.ToString()
};
thread.Start();
}
else
{
// synchronous connect
try
{
Tracer.DebugFormat("Attempting sync connect to: {0}", uri);
transport = TransportFactory.CompositeConnect(uri);
chosenUri = transport.RemoteAddress;
break;
}
catch (Exception e)
{
Failure = e;
Tracer.DebugFormat("Connect fail to: {0}, reason: {1}", uri, e.Message);
}
}
}
if (asyncConnect)
{
// now wait for transport to be populated, but timeout eventually
allDone.WaitOne(asyncTimeout, false);
}
if (transport != null)
{
transport.Command = OnCommand;
transport.Exception = OnException;
transport.Start();
if (started)
{
RestoreTransport(transport);
}
if (this.Resumed != null)
{
this.Resumed(transport);
}
Tracer.Debug("Connection established");
ReconnectDelay = InitialReconnectDelay;
ConnectedTransportURI = chosenUri;
ConnectedTransport = transport;
connectFailures = 0;
connected = true;
Monitor.PulseAll(reconnectMutex);
if (firstConnection)
{
firstConnection = false;
Tracer.InfoFormat("Successfully connected to: {0}", chosenUri.ToString());
}
else
{
Tracer.InfoFormat("Successfully reconnected to: {0}", chosenUri.ToString());
}
return(false);
}
if (asyncConnect)
{
Tracer.DebugFormat("Connect failed after waiting for asynchronous callback.");
}
}
catch (Exception e)
{
Failure = e;
Tracer.DebugFormat("Connect attempt failed. Reason: {0}", e.Message);
}
}
int reconnectAttempts = 0;
if (firstConnection)
{
if (StartupMaxReconnectAttempts != 0)
{
reconnectAttempts = StartupMaxReconnectAttempts;
}
}
if (reconnectAttempts == 0)
{
reconnectAttempts = MaxReconnectAttempts;
}
if (reconnectAttempts > 0 && ++connectFailures >= reconnectAttempts)
{
Tracer.ErrorFormat("Failed to connect to transport after {0} attempt(s)", connectFailures);
connectionFailure = Failure;
this.Exception(this, connectionFailure);
return(false);
}
}
}
if (!disposed)
{
Tracer.DebugFormat("Waiting {0}ms before attempting connection.", ReconnectDelay);
lock (sleepMutex)
{
try
{
Thread.Sleep(ReconnectDelay);
}
catch (ThreadInterruptedException)
{
}
}
if (UseExponentialBackOff)
{
// Exponential increment of reconnect delay.
ReconnectDelay *= ReconnectDelayExponent;
if (ReconnectDelay > MaxReconnectDelay)
{
ReconnectDelay = MaxReconnectDelay;
}
}
}
return(!disposed);
}